Quite a vague question, I used desmos to graph the attached photo.
Step-by-step explanation:
v=Ah
A=9×12
= 108
then, v=108×8
0.05 mm * ? days = 0.75 inch
Use proportions
1 mm = 0.0394 inch
0.05 mm = 0.00197 inch
0.75 inch / 0.00197 inch = 380.71
380.71 days / 30 days = 12.7 months
We can find x only if we know that the figure is a REGULAR octagon, i.e. an octagon with all sides equal, and all interior angles equal.
We will ASSUME that the figure is a regular octagon.
For a regular polygon, the central angle subtended by each side is equal.
The central angle is 360 degrees.
So the central angle subtended by a single side euqals
a=360 degrees / 8 sides = 45 degrees / side
Since x is the total angle subtended by three sides, so
x=3*45=135 °
